When you ask "What number is halfway between 88 and 531?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=531.
To find the number halfway between 88 and 531, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 531 into our formula, we get:
(88 + 531)/2 = 309.5
Thus, the number halfway between 88 and 531 is 309.5.
To check that our answer is correct, we subtract 88 from 309.5 and subtract 309.5 from 531 and compare the two numbers:
309.5 - 88 = 221.5
531 - 309.5 = 221.5
As you can see, the halfway number is 221.5 higher than 88 and 221.5 lower than 531. Therefore, our halfway between answer of 309.5 above is correct.
Halfway Between
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Halfway Between 88 and 532
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